Didn't get a photo, but I tacked this beer to secondary so I could lager my ale for a couple months (snicker), and it seems to have worked ok. No astringency from the boiled malt, and it came out a great copper color. Much more color extraction than if I had added this grain to the mash. Quite a bit of the powdered malt made it into the fermenter because I boiled off way more than expected, but it fell to the bottom with the yeast.
Not something I'd do every time, but it seems quite effective at darkening a beer that comes out too light after the run-off. Just my two pfennig.